Ammonia-generator.



' A. E. BOSSE.

AMMONIA GENERATOR.

APPLIVOATION FILED FEB. 2 1910.

1,012,056, Patented Dec. 19, 1911.

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UNITED STATES PATENT OFFICE.

ADOLPHE E. 130885 OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 ACME REFRIG-ERATING COMPANY, A CORPORATION OF DELAWARE.

AMMONIA-GENERATOR.

Specification of Letters Patent.

Patented Dec. 19, 1911.

To all whom it may concern:

Be it known that I, ADOLPHE E. Bossri, a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inAmmonia-Generators, is a specification.

My invention relates to a generator for use in absorption refrigeratingsystems, and in such connection it has particular relation to theconstruction and arrangement of a device for liberating and absorbingthe ammonia gas from the aqua ammonia used in such refrigeratingsystems.

The object of my invention is to provide a simple and efficient devicefor use as a combined generator and absorber in ammonia absorptionrefrigerating systems in which the heat applied for driving off theammonia gas will be utilized to the fullest extent.

My invention also contemplates means for cooling the contained liquorwhereby the generator will also act as an absorber, thus obviating thenecessity of a separate device for this purpose, to the end that theentire refrigerating system may be simplified.

The nature and characteristic features of of which the following myinvention will be more readily understood from the following descriptiontaken in connection with the accompanying drawings forming part hereof,in which,

Figure 1 is a vertical, central section of a generator and absorberembodying the main features of my present invention; and Fig. 2 is aside elevation thereof, partly broken away to expose parts of theinterior construction.

Referring to the drawings, 3 is a cylind'rical receptacle or tankforming the body of the generator proper. The tank 3 is preferablyarranged with its axis vertical and is provided at its upper end with ahead 4 into which is tapped a pipe 5 for the passage of the liberatedammonia gas into the refrigeration system. The lower end of the tank 3is provided with a head 6, preferably dish shaped, from which dependsdownwardly a coil.7, having its two ends secured to the head 6 at pointsof different levels whereby the circulation of the liquor through thecoil 7 is insured. A pipe 8 for the return of the used ammonia gas tothe generator preferably communicates with the coil 7 at-some pointintermediate the two ends thereof so that the returning gas will passthrough the coil 7 and be thoroughly distributed through the liquidcontained within the tank 3. Disposed beneath the coil 7 is a burner9ofany preferred type, so arranged that the products of combustion willpass upwardly through the center of the coil 7 and abafiie plate 10 isarranged at the upper end of the coil 7, being interposed bet-ween theinterior of said coil and the lower head 6 of the tank 3. The baffleplate 10 serves to deflect the products of combustion so that the heatfrom the burner 9 will be utilized to the fullest extent. secured in thehead 6 over the baflle plate 10, being bent within and passing throughthe lower part of the tank 3 whereby the heat will be further utilizedbefore the A flue 11 has one end products of combustion are permitted toescape. Arranged within the body of the tank 3 is a cooling coil 12,whereby' the liquid contained within the tank 3 may be reduced intemperature at the proper time as hereinafter more fully set forth. Theburner 9 and coil 7 are surrounded by a casing 13 which may beperforated near the bottom edge for the ingress of air for the purposeof the combustion. The casing 13 may also serve as a support for thetank 3 as well as a shield to conserve .the heat of the products ofcombustion of the burner 9.

The operation of the device is as follows: The tank 3 initially containsa quantity of aqua ammonia of the desired degree of strength. When theburner 9 is lighted the aqua-ammonia will be caused to circulate throughthe worm 7 becoming heated in its passage therethrough. whereby theammonia gas will be driven off from the solution and will pass by meansof the pipe 5 into the refrigerating system. As is well known in theabsorption refrigeration art, the ammonia gas after being driven ofi bythe heat from the generator is then condensed while being p maintainedat the same high pressure as that of the interior of the generator,whereby the ammonia gas will become liquefied into anhydrous ammonia,after which 1t may be .'pansion valve, losing its pressure at the sametime and effecting the refrigeration, after which the gas may bereabsorbed by the then weaker aqua ammonia. In the operation of thesesystems the action is an intermittent one, the ammonia gas which isdriven o-fi being stored after being liquefied, this operation extendingover a certain interval of t' e during which the heat is applied by niiians of the burner 9. The step of the cycle of 0 rations during which therefrigeration is ta ing place extends over the greater proportion of thetime occupied by the complete cycle.

I-Ieretofore it has been usual to reabsorb the ammonia gas in theweakened ammonia solution in a separate receptacle, but in the device ofthe present invention the cooling coil-12 is provlded, whereby theliquid may be reduced in temperature within the generator proper afterthe burner 9 is extinguished, and the generator may therefore also beused as an absorber.

By the construction above described there is provided means forobtaining great efli ciency in the application of the heat, as well aseliminating complication in the refrigerating system proper on accountof the consolidation of the absorber and generator in the one compositestructure.

Having thus described the nature and characterlst c features of myinvention, what I claim as new and desire to secure by Let-- ters Patentis: 1. In a device of the character described,

'a tank, a heating coil depending from the,

lower part of said tank, an ammonia return pipe communicating with saidheating coil, and a burner located beneath said-coil.

2. In a device of the character described, a tank, a heating coildepending from the lower part of said tank, a burner located beneathsaid coil, a baflie plate interposed between said coil and said tank, acasing surrounding said coil and burner, and a flue passing through saidtank for the outlet of the products of combustion.

3. In a device of the character described, a tank, a' heating coilcommunicating with said tank at two points of different levels,

an ammonia return pipe communicating with said heating coil, a burnerlocated beneath said coil, a casing surrounding said coil and burner, abafiie plate interposed between said coil and said tank, a flue passingthrough said tank! for the escape of the products of combustion, and a,cooling coil located within said tank.

In testimony whereof, I have hereunto signed my namein the presence oftwo witnesses.

- ADOLPHE E. BOSSE;

Witnesses MABEL FEBRELL, SARA EWING.

